I think _____ is very important for students to study by themselves in the school or at home.
A. it B. this C. that
Could you please tell me_?
A. why does the earth go around the sun
B. why the earth goes around the sun
C. why the earth went around the sun
The baby is sleeping. Please__the radio.
A. turn on B. him down C. turn up
We will climb the mountain tomorrow_it doesn't rain.
A. if B. although C. since
Boys and girls, the books in the library should______ good care of.
A. take B. are taking C. be taken
-Where's your father, Tom?
-He__to Changsha.
A. goes B. went C. has gone
